I’m trying to create a basic login system with Python that only includes a username. Here is a snippet of what I’m having issues with.
I added a few usernames to the .txt file and it can find conflicts or login properly but it can’t actually register a username. I’ve done some research and am opening the file in “append” mode and using the
def register(): file1 = open("C:/test/User_Dat.txt", "a") global username username = str(input("Please enter a username n")).lower() readfile = file1.read() if username in readfile: print('The user', username, 'has already been created.') welcome() else: print('The user', username, 'has been created!') file1.write(username) file1.write("n") file1.close() login()
But I still get an error like this:
io.UnsupportedOperation: not writable
Why is the file not writable?
You are opening file in reading mode. Fix this line as follows:
file1 = open("C:/test/User_Dat.txt", "r+")